Bad Beams? | How divergent are lasers?

Laser beams are amazing to watch since they appear like a string of light. Not like a wash of illumination from other light sources.
But does a laser beam spread out? Does it diverge - getting wider over distance? Let's measure the divergence of my cheapest and most expensive lasers!
LaserCube WiFi 2.5W and ND8 filter for it donated by www.wickedlasers.com
See the correction optics in the 2W version here: • LaserCube 2.0 | They D...
Measuring power and wavelength of my strongest lasers, including the Laserglow Hercules: • Strongest LASERs in my...
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FULL MUSIC CREDITS
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"Fluidscape" Kevin MacLeod (incompetech.com)
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"Darkness is Coming" Kevin MacLeod (incompetech.com)
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"Lightless Dawn" Kevin MacLeod (incompetech.com)
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"Perspectives" Kevin MacLeod (incompetech.com)
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"Neo Western" Kevin MacLeod (incompetech.com)
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All music above licensed under Creative Commons: By Attribution 3.0 License
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Mix of two tracks:
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2) "Spacial Harvest" Kevin MacLeod (incompetech.com)
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#Divergence #Laser #Brainiac75

[@cringemaki]

"My method is more like......ghetto style"

[@aarongreenfield9038]

Thanks for Pointing us in the right direction, and keeping us on the straight and narrow.

[@AJMansfield1]

4:30

[@CnCDune]

Will happily take ghetto setups as long as the units used are ISO units :)

[@Hvidbergen]

At

[@muffty1337]

I'd like to hear more

[@GQuack]

I never really thought how big of a factor laser divergence is until now when looking at long distances. Very interesting!

[@Cyparagon]

Larger multimode diodes have a fast axis and a slow axis. Because of diffraction limitation physics, a smaller beam has a larger divergence (all else equal) which explains much of the reason the red diverges faster from the smaller initial axis. The beam correction optics principal is therefore simple: Expand the smaller (initial) axis to reduce its divergence.

[@CussingBee]

I was honestly just checking to see if you have any new videos up and I saw this!

[@sherrymaloner8843]

You uploading today was the highlight of my day <3

[@a.wright281]

Such an amazing video, keep up the good work!

[@VeganCheeseburger]

Would love a video on your entertainment system speakers!

[@psygn0sis]

1:36

[@randomperson1418]

Great video! Finally i have something good to watch :D

[@Jesus_paid_it_all]

Nice Friday timing! Love the quality of your videos. Keep up the great work!

[@albyboy4278]

The divergence depends on the quality of the lenses used and collimation done well with distances of 100m from the laser.

[@yurym4385]

You can use a mirrorless camera to capture the beam profile. Moreover, if you capture it in several planes you can completely recover the phase profile which is the all information you can get about the beam quality.

[@AluminumOxide]

0:43

[@Verified_69]

Wow another month has flown by. Thanks for the upload

[@ccllvn]

watching from Germany. Keep up the good videos !!